This is challenging because of the time period, between censuses, when they arrived and Lise and Kari supposedly died. Ontario started civil registration of vital records in 1869, but it was pretty spotty the first few years.
The Carl in the cemetery was born in 1870, so it could have been his father Martine went to. It looks like she was in South Dakota by 1880
In addition to falsterdens questions, would it also be possible to copy her obit here? Thanks.